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Article ; Online: Combined impacts of Si-rich rice residues and flooding extent on grain As and Cd in rice

Angelia L. Seyfferth / Douglas Amaral / Matt A. Limmer / Luiz R.G. Guilherme

Environment International, Vol 128, Iss , Pp 301-

2019 Volume 309

Abstract: Increasing plant-availability of Si through soil amendment of Si-rich rice residues can decrease inorganic As without affecting Cd levels in grain under flooded soil conditions. However, the impacts of Si amendments on Cd and As uptake by rice under ... ...

Abstract	Increasing plant-availability of Si through soil amendment of Si-rich rice residues can decrease inorganic As without affecting Cd levels in grain under flooded soil conditions. However, the impacts of Si amendments on Cd and As uptake by rice under different flooding extents have not been reported. We investigated the effects of different flooding extent on As and Cd uptake by rice and accumulation in grain in well-weathered soil amended with Si-rich rice husk (Husk) or mixed charred/ashed rice husk (Ash). Our results show that Husk and to a lesser extent Ash amendments decreased grain As under both flooded (~40% and 20% decrease, respectively) and nonflooded (~75% decrease) conditions due to increased Si. Under flooded conditions grain As and yield is higher, and Husk amendment additionally decreased grain inorganic As by ~45%. Under nonflooded conditions grain Cd is higher and yield is lower, and Ash amendment decreased grain, husk, and straw Cd by ~40–50% not due to Si, but due to increased aboveground biomass and an increase in soil pH, which helped to retain Cd in soil. These data illustrate that rice residue addition to paddy soil can lower human health risk under both flooded and nonflooded conditions without affecting grain Zn and Fe. Keywords: Rice husk, Charred husk, Water management, Trace metal(loid)s
Keywords	Environmental sciences ; GE1-350
Subject code	669
Language	English
Publishing date	2019-07-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Zinc and selenium accumulation and their effect on iron bioavailability in common bean seeds

de Figueiredo, Marislaine A / Jonathan J. Hart / Li Li / Luiz R.G. Guilherme / Messias J.B. de Andrade / Paulo F. Boldrin / Raymond P. Glahn

Plant physiology and biochemistry. 2017 Feb., v. 111

2017

Abstract: Common beans (Phaseolus vulgaris) are the most important legume crops. They represent a major source of micronutrients and a target for essential trace mineral enhancement (i.e. biofortification). To investigate mineral accumulation during seed ... ...

Abstract	Common beans (Phaseolus vulgaris) are the most important legume crops. They represent a major source of micronutrients and a target for essential trace mineral enhancement (i.e. biofortification). To investigate mineral accumulation during seed maturation and to examine whether it is possible to biofortify seeds with multi-micronutrients without affecting mineral bioavailability, three common bean cultivars were treated independently with zinc (Zn) and selenium (Se), the two critical micronutrients that can be effectively enhanced via fertilization. The seed mineral concentrations during seed maturation and the seed Fe bioavailability were analyzed. Common bean seeds were found to respond positively to Zn and Se treatments in accumulating these micronutrients. While the seed pods showed a decrease in Zn and Se along with Fe content during pod development, the seeds maintained relatively constant mineral concentrations during seed maturation. Selenium treatment had minimal effect on the seed accumulation of phytic acid and polyphenols, the compounds affecting Fe bioavailability. Zinc treatment reduced phytic acid level, but did not dramatically affect the concentrations of total polyphenols. Iron bioavailability was found not to be greatly affected in seeds biofortified with Se and Zn. In contrast, the inhibitory polyphenol compounds in the black bean profoundly reduced Fe bioavailability. These results provide valuable information for Se and Zn enhancement in common bean seeds and suggest the possibility to biofortify with these essential nutrients without greatly affecting mineral bioavailability to increase the food quality of common bean seeds.
Keywords	bioavailability ; biofortification ; black beans ; crops ; cultivars ; iron ; nutrients ; Phaseolus vulgaris ; phytic acid ; pods ; polyphenols ; seed maturation ; seeds ; selenium ; zinc
Language	English
Dates of publication	2017-02
Size	p. 193-202.
Publishing place	Elsevier Masson SAS
Document type	Article
ZDB-ID	742978-2
ISSN	1873-2690 ; 0981-9428
ISSN (online)	1873-2690
ISSN	0981-9428
DOI	10.1016/j.plaphy.2016.11.019
Database	NAL-Catalogue (AGRICOLA)

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Article: Rare Earth Elements in the Soil Environment

Ramos, Silvio J / Guilherme S. Dinali / Cynthia Oliveira / Gabriel C. Martins / Cristiano G. Moreira / José O. Siqueira / Luiz R. G. Guilherme

Curr Pollution Rep. 2016 Mar., v. 2, no. 1

2016

Abstract: Rare earth elements (REE) are a homogenous group of 17 chemical elements in the periodic table that are key to many modern industries including chemicals, consumer electronics, clean energy, transportation, health care, aviation, and defense. Moreover, ... ...

Abstract	Rare earth elements (REE) are a homogenous group of 17 chemical elements in the periodic table that are key to many modern industries including chemicals, consumer electronics, clean energy, transportation, health care, aviation, and defense. Moreover, in recent years, they have been used in agriculture. One of the consequences of their worldwide use is the possible increase of their levels in various environmental compartments. This review addresses major topics concerning the study of REE in the soil environment, with special attention to the latest research findings. The main sources of REE to soils, the contents of REE in soils worldwide, and relevant information on the effects of REE to plants were explored. Ecological and human health risk issues related to the presence of REE in soils were also discussed. Although several findings reported positive effects of REE on plant growth, many questions about their biological role remain unanswered. Therefore, studies concerning the actual mechanism of action of these elements on cellular and physiological processes should be further refined. Even more urgent is to unveil their chemical behavior in soils and the ecological and human health risks that might be associated with the widespread use of REE in our modern society.
Keywords	aviation ; clean energy ; edaphic factors ; electronics ; health services ; industry ; mechanism of action ; plant growth ; rare earth elements ; risk ; soil ; soil pollution ; transportation
Language	English
Dates of publication	2016-03
Size	p. 28-50.
Publishing place	Springer International Publishing
Document type	Article
Note	Review
ISSN	2198-6592
DOI	10.1007/s40726-016-0026-4
Database	NAL-Catalogue (AGRICOLA)

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Article: Determination of zinc in rice grains using DTZ staining and ImageJ software

Duarte, Rômulo F / André R. Reis / Chanakan Prom-u-thai / Douglas C. Amaral / Eduardo Alves / Luiz R.G. Guilherme / Valdemar Faquin

Journal of cereal science. 2016 Mar., v. 68

2016

Abstract: Dithizone (DTZ) staining is a rapid, simple, and inexpensive method that allows the histochemical localization of Zn. In this study, we evaluated genotypic variation in Zn concentration in brown rice grown in the field using atomic absorption ... ...

Abstract	Dithizone (DTZ) staining is a rapid, simple, and inexpensive method that allows the histochemical localization of Zn. In this study, we evaluated genotypic variation in Zn concentration in brown rice grown in the field using atomic absorption spectrophotometer (AAS) as DTZ staining quantified using ImageJ software. We used dehusked grains from upland rice accessions widely cultivated in Brazil. The DTZ staining showed that the concentration of Zn varied within and between rice grains. The staining intensity index (Y) provided differences in localization of Zn across the grain regions. Zn concentration in brown rice varied in multiple regression analysis, showing major differences in index weighted by stained area of each region (YAW) for the embryo, endosperm, and aleurone, especially in the endosperm and aleurone regions due to a large portion of the area in the kernel. The total YAW among rice accessions was positively correlated with Zn concentration in grains by chemical analysis. The DTZ staining associated with imageJ software is a promising to estimate Zn concentration in different grain tissues. Thus, this method may be useful for rapid screening of rice germplasms.
Keywords	atomic absorption spectrometry ; brown rice ; chemical analysis ; computer software ; correlation ; endosperm ; germplasm ; highlands ; rapid methods ; regression analysis ; screening ; seeds ; staining ; tissues ; zinc ; Brazil
Language	English
Dates of publication	2016-03
Size	p. 53-58.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	408468-8
ISSN	0733-5210
ISSN	0733-5210
DOI	10.1016/j.jcs.2015.11.006
Database	NAL-Catalogue (AGRICOLA)

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Article: Chromate and phosphate inhibited each other's uptake and translocation in arsenic hyperaccumulator Pteris vittata L

de Oliveira, LetÃºzia M / Jason T. Lessl / Julia Gress / Lena Q. Ma / Luiz R.G. Guilherme / Rujira Tisarum

Environmental pollution. 2015 Feb., v. 197

2015

Abstract: We investigated the effects of chromate (CrVI) and phosphate (P) on their uptake and translocation in As-hyperaccumulator Pteris vittata (PV). Plants were exposed to 1) 0.10Â mM CrVI and 0, 0.25, 1.25, or 2.50Â mMÂ P or 2) 0.25Â mMÂ P and 0, 0.50, 2.5 or ...

Abstract	We investigated the effects of chromate (CrVI) and phosphate (P) on their uptake and translocation in As-hyperaccumulator Pteris vittata (PV). Plants were exposed to 1) 0.10Â mM CrVI and 0, 0.25, 1.25, or 2.50Â mMÂ P or 2) 0.25Â mMÂ P and 0, 0.50, 2.5 or 5.0Â mM CrVI for 24Â h in hydroponics. PV accumulated 2919Â mg/kg Cr in the roots at CrVI0.10, and 5100 and 3500Â mg/kg P in the fronds and roots at P0.25. When co-present, CrVI and P inhibited each other's uptake in PV. Increasing P concentrations reduced Cr root concentrations by 62â82% whereas increasing CrVI concentrations reduced frond P concentrations by 52â59% but increased root P concentrations by 11â15%. Chromate reduced P transport, with more P being accumulated in PV roots. Though CrVI was supplied, 64â78% and 92â93% CrIII were in PV fronds and roots. Based on X-ray diffraction, Cr2O3 was detected in the roots confirming CrVI reduction to CrIII by PV. In short, CrVI and P inhibited each other in uptake and translocation by PV, and CrVI reduction to CrIII in PV roots served as its detoxification mechanism. The finding helps to understand the interactions of P and Cr during their uptake in PV.
Keywords	arsenic ; chromium ; fronds ; hydroponics ; hyperaccumulators ; phosphates ; Pteris vittata ; roots ; X-ray diffraction
Language	English
Dates of publication	2015-02
Size	p. 240-246.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	280652-6
ISSN	1873-6424 ; 0013-9327 ; 0269-7491
ISSN (online)	1873-6424
ISSN	0013-9327 ; 0269-7491
DOI	10.1016/j.envpol.2014.11.009
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Article: Effects of arsenate, chromate, and sulfate on arsenic and chromium uptake and translocation by arsenic hyperaccumulator Pteris vittata L

de Oliveira, LetÃºzia Maria / Jason T. Lessl / Jorge A.G. Santos / Lena Q. Ma / Luiz R.G. Guilherme

Environmental pollution. 2014 Jan., v. 184

2014

Abstract: We investigated effects of arsenate (AsV), chromate (CrVI) and sulfate on As and Cr uptake and translocation by arsenic hyperaccumulator Pteris vittata (PV), which was exposed to AsV, CrVI and sulfate at 0, 0.05, 0.25 or 1.25Â mM for 2-wk in hydroponic ... ...

Abstract	We investigated effects of arsenate (AsV), chromate (CrVI) and sulfate on As and Cr uptake and translocation by arsenic hyperaccumulator Pteris vittata (PV), which was exposed to AsV, CrVI and sulfate at 0, 0.05, 0.25 or 1.25Â mM for 2-wk in hydroponic system. PV was effective in accumulating large amounts of As (4598 and 1160Â mg/kg in the fronds and roots at 0.05Â mM AsV) and Cr (234 and 12,630Â mg/kg in the fronds and roots at 0.05Â mM CrVI). However, when co-present, AsV and CrVI acted as inhibitors, negatively impacting their accumulation in PV. Arsenic accumulation in the fronds was reduced by 92% and Cr by 26%, indicating reduced As and Cr translocation. However, addition of sulfate increased uptake and translocation of As by 26â28% and Cr by 1.63 fold. This experiment demonstrated that As and Cr inhibited each other in uptake and translocation by PV but sulfate enhanced As and Cr uptake and translocation by PV.
Keywords	arsenates ; arsenic ; chromium ; fronds ; hydroponics ; hyperaccumulators ; Pteris vittata ; roots ; sulfates
Language	English
Dates of publication	2014-01
Size	p. 187-192.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	280652-6
ISSN	1873-6424 ; 0013-9327 ; 0269-7491
ISSN (online)	1873-6424
ISSN	0013-9327 ; 0269-7491
DOI	10.1016/j.envpol.2013.08.025
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Transitions to sustainable management of phosphorus in Brazilian agriculture

Paul J. A. Withers / Marcos Rodrigues / Amin Soltangheisi / Teotonio S. de Carvalho / Luiz R. G. Guilherme / Vinicius de M. Benites / Luciano C. Gatiboni / Djalma M. G. de Sousa / Rafael de S. Nunes / Ciro A. Rosolem / Fernando D. Andreote / Adilson de Oliveira / Edson L. M. Coutinho / Paulo S. Pavinato

Scientific Reports, Vol 8, Iss 1, Pp 1-

2018 Volume 13

Abstract: Abstract Brazil’s large land base is important for global food security but its high dependency on inorganic phosphorus (P) fertilizer for crop production (2.2 Tg rising up to 4.6 Tg in 2050) is not a sustainable use of a critical and price-volatile ... ...

Abstract	Abstract Brazil’s large land base is important for global food security but its high dependency on inorganic phosphorus (P) fertilizer for crop production (2.2 Tg rising up to 4.6 Tg in 2050) is not a sustainable use of a critical and price-volatile resource. A new strategic analysis of current and future P demand/supply concluded that the nation’s secondary P resources which are produced annually (e.g. livestock manures, sugarcane processing residues) could potentially provide up to 20% of crop P demand by 2050 with further investment in P recovery technologies. However, the much larger legacy stores of secondary P in the soil (30 Tg in 2016 worth over $40 billion and rising to 105 Tg by 2050) could provide a more important buffer against future P scarcity or sudden P price fluctuations, and enable a transition to more sustainable P input strategies that could reduce current annual P surpluses by 65%. In the longer-term, farming systems in Brazil should be redesigned to operate profitably but more sustainably under lower soil P fertility thresholds.
Keywords	Medicine ; R ; Science ; Q
Language	English
Publishing date	2018-02-01T00:00:00Z
Publisher	Nature Publishing Group
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Medical geology in the framework of the sustainable development goals

Bundschuh, Jochen / Chien-Yen Chen / Christa Pudmenzky / Faruque Parvez / Ihsan Hamawand / Jerusa Schneider / Jyoti Prakash Maity / Kathryn Reardon-Smith / Louis Kouadio / Luiz R.G. Guilherme / Meththika Vithanage / Nasreen Islam Khan / Nury Morales-Simfors / Prosun Bhattacharya / Saman Seneweera / Sara Ghaze / Shahbaz Mushtaq

Science of the total environment. 2017 Mar. 01, v. 581-582

2017

Abstract: Exposure to geogenic contaminants (GCs) such as metal(loid)s, radioactive metals and isotopes as well as transuraniums occurring naturally in geogenic sources (rocks, minerals) can negatively impact on environmental and human health. The GCs are released ...

Abstract	Exposure to geogenic contaminants (GCs) such as metal(loid)s, radioactive metals and isotopes as well as transuraniums occurring naturally in geogenic sources (rocks, minerals) can negatively impact on environmental and human health. The GCs are released into the environment by natural biogeochemical processes within the near-surface environments and/or by anthropogenic activities such as mining and hydrocarbon exploitation as well as exploitation of geothermal resources. They can contaminate soil, water, air and biota and subsequently enter the food chain with often serious health impacts which are mostly underestimated and poorly recognized. Global population explosion and economic growth and the associated increase in demand for water, energy, food, and mineral resources result in accelerated release of GCs globally. The emerging science of “medical geology” assesses the complex relationships between geo-environmental factors and their impacts on humans and environments and is related to the majority of the 17 Sustainable Development Goals in the 2030 Agenda of the United Nations for Sustainable Development. In this paper, we identify multiple lines of evidence for the role of GCs in the incidence of diseases with as yet unknown etiology (causation). Integrated medical geology promises a more holistic understanding of the occurrence, mobility, bioavailability, bio-accessibility, exposure and transfer mechanisms of GCs to the food-chain and humans, and the related ecotoxicological impacts and health effects. Scientific evidence based on this approach will support adaptive solutions for prevention, preparedness and response regarding human and environmental health impacts originating from exposure to GCs.
Keywords	air ; anthropogenic activities ; bioavailability ; disease incidence ; ecotoxicology ; energy ; environmental health ; environmental impact ; etiology ; food chain ; human health ; isotopes ; metals ; mineral resources ; minerals ; mining ; population growth ; rocks ; soil ; sustainable development ; United Nations
Language	English
Dates of publication	2017-0301
Size	p. 87-104.
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2016.11.208
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Article ; Online: Adsorção e dessorção aniônicas individuais por gibbsita pedogenética Individual anionic adsorption and desorption by pedogenic gibbsite

Adélia A. A. Pozza / Nilton Curi / Luiz R. G. Guilherme / João J. G. S. M. Marques / Enio T. S. Costa / Daniela Q. Zuliani / Paulo E. F. Motta / Rodrigo S. Martins / Luiz C. A. Oliveira

Química Nova, Vol 32, Iss 1, Pp 99-

2009 Volume 105

Abstract: Anion adsorption/desorption dynamics was studied as individual processes on surface of particles of a gibbsitic clay. The data suggest a remarkable gibbsite role as nitrate leaching retardant in soil. The opposite behavior of gibbsite towards adsorption/ ... ...

Abstract	Anion adsorption/desorption dynamics was studied as individual processes on surface of particles of a gibbsitic clay. The data suggest a remarkable gibbsite role as nitrate leaching retardant in soil. The opposite behavior of gibbsite towards adsorption/desorption of silicate and phosphate suggests the need of an adequate compromise solution regarding interval and rate applications of anions in cultivated gibbsitic soils. The high P adsorption verified in pH values lower than that reported for the point of zero charge of synthetic Al-hydroxides implies that this process takes place in pedogenic gibbsites through inner sphere complexation.
Keywords	retention ; anions ; Al-hydroxide ; Chemistry ; QD1-999
Language	English
Publishing date	2009-01-01T00:00:00Z
Publisher	Sociedade Brasileira de Química
Document type	Article ; Online
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